Tsetse flies and female mosquitoes fuel their energetically costly flying activities by directly burning the amino acids that make up the proteins found in their food.
Similarly, the spread southward of Fertile Crescent domestic animals through Africa was stopped or slowed by climate and disease, especially by trypanosome diseases carried by tsetse flies.
Tsetse flies may be a little bit closer because they have one gland that's all branched and comes to one individual spot where the mouth parts are right there.
So let's get into the hows and the whys and what of insects that nurse their young, including tsetse flies, and of course, our beloved milky mama roach, Diploptera punctata.